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  1. hcup-us.ahrq.gov/db/nation/neds/NEDS2011Introduction01142014.pdf
    November 01, 2015 - The NIS is a sample of U.S. hospitals; the NEDS is a sample of U.S. hospital-based EDs. … (universe) ÷ Ns(sample) where Ws(universe) was the ED universe weight, and Ns(universe) and Ns(sample … A larger sample would be cumbersome for data users, given that a 20% sample contains 29 million records … The HCUP Nationwide Inpatient Sample (NIS) uses the same stratified sample design, so techniques appropriate … Sample (NEDS) Nationwide sample drawn from the HCUP SID and SEDD, stratified and weighted to be
  2. Kid 1997 Comparison (pdf file)

    hcup-us.ahrq.gov/db/nation/kid/reports/KID_1997_Comparison.pdf
    January 01, 1997 - HCUP KID (01/28/02) 4 Comparative Analysis KID Sample Design The KID is a stratified probability sampleSample Weights Sample weights were developed for the KID to obtain representative national estimates … sample. … All KID and NIS statistics used sample weights and accounted for the sample design using the SUDAAN microcomputer … The pediatric NHDS is less than 4 percent the size of the KID sample, and as a result the number of sample
  3. hcup-us.ahrq.gov/db/nation/neds/NEDS2014Introduction.pdf
    December 12, 2016 - universe) ÷ Ns(sample) where Ws(universe) was the ED universe weight, and Ns(universe) and Ns(sample … A larger sample would be cumbersome for data users, given that a 20 percent sample contains about 30 … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … of EDs HCUP Nationwide Emergency Department Sample (NEDS) Nationwide sample drawn from the HCUP
  4. 2017-01 (pdf file)

    hcup-us.ahrq.gov/reports/methods/2017-01.pdf
    January 01, 2017 - ............................................................................................... 1 Sample … The NRD is a sample of convenience from the SID and not a sample of hospitals or discharges. … Each year of the NRD must be considered as a separate sample. … The standard approach treats stratum sample sizes 𝑛𝑛𝑠𝑠 as random variables. … Calculating National Inpatient Sample (NIS) Variances for Data Years 2012 and Later.
  5. 2017-02 (pdf file)

    hcup-us.ahrq.gov/reports/methods/2017-02.pdf
    January 01, 2017 - The Nationwide Emergency Department Sample (NEDS) The NEDS is built using a 20 percent stratified sample … Draw a sample of ED visits from all EDs in HCUP data The NEDS includes all ED visits from a sample … The redesigned NIS changed from a sample of hospitals to a sample of discharges. … The redesigned NIS changed from a sample of hospitals to a sample of inpatient discharges. … universe and sample, respectively.
  6. hcup-us.ahrq.gov/db/nation/nis/DataElements_NIS_2002_Hospital.pdf
    January 01, 2002 - Description of Data Elements Description of Data Elements Nationwide Inpatient Sample … Please refer to the Introduction to the Nationwide Inpatient Sample for specific information on which … to post-stratify hospital................................................ 43 S_DISC_S - Number of sample … in NIS_STRATUM .................................... 47 S_HOSP_S - Number of sample hospitals in STRAT_ST … ............................................. 48 S_HOSP_U - Number of sample hospitals in NIS_STRATUM
  7. hcup-us.ahrq.gov/db/nation/nis/2006NIS_INTRODUCTION.pdf
    November 01, 2015 - HCUP Nationwide Inpatient Sample (NIS) ABSTRACT The Nationwide Inpatient Sample (NIS) is part of … Moreover, the NIS is composed of all discharges from a sample of hospitals (a cluster sample). … Final Hospital Sample In Appendix I, we present three figures describing the final hospital sample. … number for the total sample. … and Ns(sample) were the number of community hospitals within stratum s in the universe and sample,
  8. meps.ahrq.gov/mepsweb/sitemap.jsp
    — Survey questionnaires   — Glossary of terms used in survey questionnaires   — Sample … Design and Data Collection Process   — Sample size   — Response rates   … — MEPS Sample Persons In-Scope for Part of the Year   — Computing Standard Errors for MEPS … questionnaires   — Glossary of terms used in survey questionnaires   — Sample … Design and Data Collection Process   — Sample size   — Response rates   —
  9. hcup-us.ahrq.gov/db/nation/nis/NIS_2008_INTRODUCTION.pdf
    January 01, 2008 - HCUP Nationwide Inpatient Sample (NIS) ABSTRACT The Nationwide Inpatient Sample (NIS) is part of … Moreover, the NIS is composed of all discharges from a sample of hospitals (a cluster sample). … Final Hospital Sample In Appendix I, we present three figures describing the final hospital sample. … number for the total sample. … and Ns(sample) were the number of community hospitals within stratum s in the universe and sample,
  10. hcup-us.ahrq.gov/db/nation/kid/DataElements_KID_Hospital_2000.pdf
    January 01, 2000 - complicated births in KID_STRATUM ............39 S_DISC_U - Number of sample discharges in KID_STRATUM … ..........................40 S_HOSP_U - Number of sample hospitals in KID_STRATUM .................. … in KID_STRATUM 6(n) Number of sample births in KID_STRATUM State Specific Notes None … non- births in KID_STRATUM 6(n) Number of sample pediatric non-births in KID_STRATUM State … in KID_STRATUM 6(n) Number of sample discharges in KID_STRATUM State Specific Notes None
  11. hcup-us.ahrq.gov/db/nation/nis/NIS_2007_INTRODUCTION.pdf
    January 01, 2007 - HCUP Nationwide Inpatient Sample (NIS) ABSTRACT The Nationwide Inpatient Sample (NIS) is part of … Moreover, the NIS is composed of all discharges from a sample of hospitals (a cluster sample). … Final Hospital Sample In Appendix I, we present three figures describing the final hospital sample. … number for the total sample. … and Ns(sample) were the number of community hospitals within stratum s in the universe and sample,
  12. meps.ahrq.gov/data_files/publications/mr1/mr1.pdf
    December 31, 1997 - The HC is the core survey, and it forms the basis for the MPC sample and part of the IC sample. … The separate NHC sample supplements the other MEPS components. … Every 5 years the HC sample size is increased. … define the sample base for the 1997 MEPS Household Component. … In 1996, the MEPS sample linked to the 1995 NHIS was selected.
  13. psnet.ahrq.gov/issue/learning-samples-one-or-fewer
    December 21, 2017 - Review Classic Learning from samples of one or fewer. Citation Text: Learning from samples of one or fewer. March JG, Sproull LS, Tamuz M. Org Sci.1991;2:1-13. (reprinted in: Qual Saf Health Care 2003;12:465-472.) Copy Citation Save S…
  14. hcup-us.ahrq.gov/figures/5_03.jsp
    Figure 5: Number of Hospitals Sampled, by Year Figure 5: Number of Hospitals Sampled, by Year Year Number of Regular Hospitals Total Number of Hospitals 1988 758 759 1989 875 882 1990 861 871 1991 847 859 1992 838 856 1993 913 (no value) …
  15. hcup-us.ahrq.gov/figures/5_04.jsp
    January 01, 2004 - Figure 5: Number of Hospitals Sampled, by Year Figure 5: Number of Hospitals Sampled, by Year Year Number of Regular Hospitals Total Number of Hospitals 2004 1,004 (no value) 2003 994 (no value) 2002 995 (no value) 2001 986 (no value) 2000 994 (no va…
  16. hcup-us.ahrq.gov/figures/5_02.jsp
    Figure 5: Number of Hospitals Sampled, by Year Figure 5: Number of Hospitals Sampled, by Year Year Number of Hospitals Total Number of Hospitals 1988 758 759 1989 875 882 1990 861 871 1991 847 859 1992 838 856 1993 913 (no value) 1994…
  17. hcup-us.ahrq.gov/figures/5_01.jsp
    Figure 5: Number of Hospitals Sampled, by Year Figure 5: Number of Hospitals Sampled, by Year Year Number of Hospitals Total Number of Hospitals 1988 758 759 1989 875 882 1990 861 871 1991 847 859 1992 838 856 1993 913 (no value) 1994…
  18. hcup-us.ahrq.gov/reports/methods/1999NISComparisonReportFinal.pdf
    March 08, 2002 - of being drawn for the sample in the following year. … Sample or Universe Sample Sample Sampling frame 24 states 50 states and the District of Columbia … A sample of 112 PSUs was selected. … A sample of hospitals was selected within these PSUs. … Sample or Universe Sample Universe Sampling frame 24 states 50 states and the District of Columbia
  19. hcup-us.ahrq.gov/db/vars/discwtcharge10/nisnote.jsp
    September 01, 2008 - QUERY TOOLS NIS Description of Data Elements   DISCWTcharge10 - 10% sample …   DISCWTcharge10 is a discharge-level weight that is only available in the 2000 10% NIS Sample … national estimates of total charge in 2000, use DISCWTcharge10 to weight total charge (TOTCHG) in the 10% Sample …   Uniform Values Variable Description Value Value Description DISCWTcharge10 10% sample … weight to discharges in the universe for national estimates of total charge in 2000. nnn.nnnn 10% sample
  20. hcup-us.ahrq.gov/reports/natstats.jsp
    December 01, 2005 - Hospitals, 1996 Hospital Inpatient Statistics, 1995 Statistics From the HCUP-3 Nationwide Inpatient Sample … for 1994: Diagnosis-Related Groups Statistics From the HCUP-3 Nationwide Inpatient Sample for 1994 … Statistics From the HCUP-3 Nationwide Inpatient Sample for 1993: Diagnosis-Related Groups Statistics … From the HCUP-3 Nationwide Inpatient Sample for 1993: Principal-Diagnosis Statistics From the HCUP … -3 Nationwide Inpatient Sample for 1993: Principal-Procedures Descriptive Statistics by Insurance